2012 Stationary Industrial Exhaust Product Guide Product Specifications/Performance Engine Exhaust Silencers Silencer Accessories Technical Capabilities Part Number Index Nelson Global Products, Inc. is the industry leader in noise control and air filtration. Our products are integrated components of complete noise control solutions for industrial process, power generation, oil and gas, marine, and emissions industry applications. Original Equipment Manufacturers rely on Nelson Global Products for a wide selection of reliable, durable products that deliver first class performance.
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2012 Stationary Industrial Exhaust Product Guide
Product Specifications/Performance
Engine Exhaust Silencers
Silencer Accessories
Technical Capabilities
Part Number Index
Nelson Global Products, Inc. is the industry leader in noise control and air filtration. Our products are integrated components of complete noise control solutions for industrial process, power generation, oil and gas, marine, and emissions industry applications. Original Equipment Manufacturers rely on Nelson Global Products for a wide selection of reliable, durable products that deliver first class performance.
Nelson Global Products, Inc. Warranty to the Original Equipment ManufacturerExhaust Products Limited WarrantyWarranty: This Warranty is provided to each original equipment manufacturer (OEM) with its purchase of any of the Nelson Global Products, Inc. products listed in the table below. Any Nelson Global Products, Inc. product determined by Nelson Global Products, Inc. to be defective in material or workmanship will, at Nelson Global Products, Inc. election, be replaced by another Nelson Global Products, Inc. product or by a credit for the original Nelson Global Products, Inc. selling price of the product. In the event that such a Nelson Global Products, Inc. product defect necessitates repair of the engine or components, Nelson Global Products, Inc. will reimburse the OEM reasonable costs to repair or replace, whichever is less, the damaged engine or components to a condition equivalent to that existing just prior to the failure.
Any claim under this Warranty for replacement or credit must be submitted in writing to Nelson Global Products, Inc. within thirty (30) days of discovering the claimed defect.
For the purpose of reviewing Warranty claim validity, Nelson Global Products, Inc. or its representatives will, at Nelson Global Products, Inc. discretion, have the right to:
a. Physically inspect the claimed defective product and/or equipment using the product.
b. Information available from purchaser or user relative to the actual application and/or use and maintenance of the product.
Duration: This Warranty extends from the in-service date of the Nelson Global Products, Inc. product installed by the original equipment manufacturer through the duration of the OEM’s base warranty, but will not exceed the coverage period stated in the table below.
Limitation: Nelson Global Products, Inc. is not responsible for product failures and/or repair costs resulting from misuse (e.g. not allowing the muffler to cool which causes an after fire event), faulty installation, alteration, misapplication, faulty maintenance practices (e.g. cleaning or servicing of spark arrestors), neglect, or accident; nor is Nelson Global Products, Inc. responsible for downtime, loss of income, living expenses, or other incidental or consequential damages. Unless otherwise agreed to in writing, this Warranty is the sole warranty made by Nelson Global Products, Inc. NELSON GLOBAL PRODUCTS, INC. MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED, OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
Exhaust Products Warranty Coverage Periods for Nelson Global Products, Inc.
Duration of Warranty period (whichever occurs first)
Application / Product YearsDistance
(miles/km)On-Highway
Heavy Duty (Class 8) 1 100,000 / 161,000
Medium Duty (Class thru 7) 1 100,000 / 161,000
Transit Bus 1 50,000 / 80,500
Coach bus 1 100,000 / 161,000
Off-highway 1 N/A
Product / Parts
Mufflers – O.E. / Std. Line 1 N/A
Tubes – Formed / Assemblies 1 N/A
Accessories - clamps, rain caps, heat-shields, adaptors, etc.
1 N/A
Pre-treatment exhaust assemblies * 1 N/A
Post-Treatment exhaust assemblies * 1 N/A
Chrome or aesthetic coated components 1 N/A
Flex pipe (interlocking/bellows design) None Sold “as is”
End In/Opposite End Out ........................................... 2-3Type 3 ............................................................................. 2-6
Side In/End Out .......................................................... 2-6Type 4 ............................................................................. 2-9
Middle Side In/End Out .............................................. 2-9Low Pressure Drop ....................................................... 2-10
Performance ............................................................ 2-10End In/Opposite End Out ......................................... 2-11
Selecting a Silencing Solution ..........................................................1-3Introduction ...............................................................................1-3Determining the Exhaust Flow Rate ...........................................1-3Method 1 ...................................................................................1-4Method 2 ...................................................................................1-5What Else Should I Know? .........................................................1-5
IntroductionSelecting a silencing solution for your application is simple. There are two methods used to make the selection:
• Use Method 1 when the pressure drop requirement is greater than 1.0 inches Hg (approximately 13.62 inches H2O).
• Use Method 2 when the Pressure Drop requirement is less than 1.0 inches Hg (approximately 13.62 inches H2O).
Determining the Exhaust Flow RateRegardless of the method you choose, you will need to know the Exhaust Flow Rate. If this value is not known, use the following equation to estimate the Exhaust Flow Rate, then proceed with Method 1 or 2 to select a silencing solution.
D × Full Load RPM × E × (T + 460°) C x 941,760where:
D = Displacement in in3
E = 0.85 efficiency for naturally aspirated engines = 1.2 for engines with scavenging blower = 1.4 for turbo-charged engines
T = Exhaust temperature (if unknown, use 900 °F (482 °C) for diesel and 1,200 °F (649 °C) for gas engines)
C = 1.0 (one-cycle engine) or 2.0 (two-cycle engine)
Estimated Exhaust Flow Rate =
Selecting a Silencing Solution
nelsonglobalproducts.com1-4
General Information
Method 1You must know the following information:
• Exhaust Flow Rate (ft3/min (m3/min))• Silencer Inlet Area (ft2 (m2))• Level of Silencing Required1. Calculate the Exhaust Gas Velocity Exhaust Flow Rate (ft3/min (m3/min)) Silencer Inlet Area (ft2 (m2))
2. Find the Estimated Pressure DropUsing the Exhaust Gas Velocity you just calculated, find the corresponding Estimated Pressure Drop in the “Typical Pressure Drop Curves” column on pages 1-6 and 1-7.
3. Select a SilencerSelect a silencer that achieves your silencing level requirements at an acceptable Pressure Drop level.
Silencer Inlet Area is 6" (152 mm) diameter which equals 0.196 ft2 (0.018 m2) Level of Silencing Required is Critical Grade
2352 ft3/min (66.60 m3/min) 0.196 ft2 (0.018 m2)
3. Using the Typical Pressure Drop Curve, find the Estimated Pressure Drop using the Exhaust Gas Velocity. For this example it is approximately 20 inches H2O (1.49 inches Hg).
0 1
0 500 1000 1500 2000 2500 3000 3500 4000
2 3 4 5 6 7 8 9 10 11 12 13 14Exhaust Gas Velocity (in thousands (ft/min))
Exhaust Gas Velocity (m/min)
Est
imat
ed P
ress
ure
Dro
p (in
H20
)
Est
imat
ed P
ress
ure
Dro
p (in
Hg)
24
4 0.25
0
0.50
0.75
1.00
1.25
1.50
1.75
0
8
12
16
20
Critical Grade Typical Pressure Drop Curve
4. If this Pressure Drop is acceptable, select any 6" (152 mm) Critical Grade silencer.
Exhaust Gas Velocity =
Exhaust Gas Velocity =
= 12,000 ft/min (3,700 m/min)
Selecting a Silencing Solution
nelsonglobalproducts.com 1-5
General Information
Method 2Using the Exhaust Flow Rate, select the correct silencing solution from the Quick Selection Table shown below. Find the lowest flow rate greater than or equal to the engine flow rate at the required silencing level.
2.640 (0.7476) 22.0 (558.8) 34,400 29,500 25,300 24,000Note: Exhaust flow rates are based on end-in end-out silencers. Refer to product specification sheets when determining side-in or middle side-in back pressure.
Velocity should not exceed 15,000 ft/min (4572 m/min) regardless of the allowable back pressure (10,000 ft/min (3048 m/min) for spark arresting silencers).
What Else Should I Know?Nelson Global Products exhaust silencers provide optimum performance for all applications by offering silencers crafted for four different attenuation grades. Due to the variability of different applications, performance levels are most accurately shown as broad range “expected attenuation bands,” which are based upon typical conditions. These bands will not define the exact insertion loss for a specific application, since insertion loss is influenced by engine size, type, speed, and unsilenced noise levels (see product spec sheets for attenuation, back pressure, and design details).
Note: Keep in mind that silencers are not designed to support their weight from the inlet or outlet tube, or support other components of the exhaust system, such as stacks. For the most efficient operation of all silencing units, proper mounting attachments are required.
Selecting a Silencing Solution
nelsonglobalproducts.com1-6
General Information
IntroductionDrains are standard on all models with a 9" (229 mm) O.D. or larger. Models with a 26" (660 mm) O.D. or smaller have a coat of high heat-resistant paint. Models larger than 26" (660 mm) O.D. have a rust-inhibiting primer under high heat-resistant paint. Maximum operating temperature is 1,250°F (677 °C) for aluminized units. Heat-resistant paint maintains its properties up to 900°F (482 °C) on aluminized steel and 1,100°F (593 °C) on mild steel.
Industrial Silencer
Residential Silencer
Critical Silencer
Hospital Silencer
LPD-1 Silencer
LPD-2 Silencer
Space Saver Silencer
Appl
icat
ion
Attenuation Level 12-18 dB 18-25 dB 25-35 dB 35-42 dB 28 dB 34 dB 25 dB
Silencing Required
Minimum Moderate Maximum Maximum ModerateModerate to Maximum
Moderate to Maximum
Ambient NoiseMedium to
HighLow to
MediumLow Low
Medium to High
Low to Medium
Low to Medium
Fitti
ng
Flanged • • • • • • •
Pipe Threads • • • •
Slotted Pipe End •
Companion Flanges Offered
4-22" (102-559 mm)
4-22" (102-559 mm)
4-22" (102-559 mm)
4-14" (102-356 mm)
4-22" (102-559 mm)
4-22" (102-559 mm)
4-22" (102-559 mm)
Cons
truct
ion
Double-Wrapped Body
• • •
Type 1 End-In, End-Out
• • • • • •
Type 2 Side-In, Side-Out
• • • • • •
Type 3 Side-In, End-Out
• • • •
Type 4 Middle Side-In,
End-Out• • • •
Up to 26" (660 mm) O.D.
Aluminized Steel*
Aluminized Steel*
Aluminized Steel*
Aluminized Steel*
Aluminized Steel*
Aluminized Steel*
Aluminized Steel*
26" (660 mm) to 36" (914 mm) O.D.
Aluminized/ Mild Steel*
Aluminized/ Mild Steel*
Aluminized/ Mild Steel*
Aluminized/ Mild Steel*
Aluminized/ Mild Steel*
Aluminized/ Mild Steel*
Aluminized/ Mild Steel*
Greater than 36" (914 mm) O.D.
Mild Steel* Mild Steel*Aluminized/ Mild Steel*
Aluminized/ Mild Steel*
Mild Steel* Mild Steel*Aluminized/ Mild Steel*
* Also available in stainless steel, which provides exceptional resistance to corrosion and has a maximum operating temperature of 1,500 °F (816 °C).
“A” Mounting FlangeStandard in sizes 4"-22"
(102-559 mm). Drilling matches 125/150# standard.
“B” Male Pipe ThreadsNPT ends offered in sizes 4" (102 mm) and smaller.
“S” Slotted Pipe EndSlotted Ends offered in
sizes 2-6" (51-152 mm).
Product Specifications
nelsonglobalproducts.com 1-7
General Information
Typical Attenuation Curves Typical Pressure Drop Curves
31.5 63 125 250 500 1000 2000 4000 8000
Octave Band Center Frequency, Hz
Inse
rtio
n Lo
ss, d
B
40
51015
0
20253035
Industrial Grade (12-18 dB Attenuation)
31.5 63 125 250 500 1000 2000 4000 8000
Octave Band Center Frequency, Hz
Inse
rtio
n Lo
ss, d
B
40
51015
0
20253035
Residential Grade (18-25 dB Attenuation)
0 1
0 500 1000 1500 2000 2500 3000 3500 4000
2 3 4 5 6 7 8 9 10 11 12 13 14Exhaust Gas Velocity (in thousands (ft/min))
Exhaust Gas Velocity (m/min)
Est
imat
ed P
ress
ure
Dro
p (in
H20
)
Est
imat
ed P
ress
ure
Dro
p (in
Hg)
24
4 0.25
0
0.50
0.75
1.00
1.25
1.50
1.75
0
8
12
16
20
0 1
0 500 1000 1500 2000 2500 3000 3500 4000
2 3 4 5 6 7 8 9 10 11 12 13 14Exhaust Gas Velocity (in thousands (ft/min))
Exhaust Gas Velocity (m/min)
Est
imat
ed P
ress
ure
Dro
p (in
H20
)
Est
imat
ed P
ress
ure
Dro
p (in
Hg)
24
4 0.25
0
0.50
0.75
1.00
1.25
1.50
1.75
0
8
12
16
20
Product Performance
Note: When figuring Pressure Drop for side or middle side inlet units, add 3 inches H2O (0.22 inches Hg) to back pressure shown on curve.
nelsonglobalproducts.com1-8
General InformationProduct Performance
31.5 63 125 250 500
Octave Band Center Frequency, Hz
Inse
rtio
n Lo
ss, d
B
1000 2000 4000 8000
40
51015
0
20253035
Critical Grade (25-35 dB Attenuation)
31.5 63 125 250 500 1000 2000 4000 8000
Octave Band Center Frequency, Hz
Inse
rtio
n Lo
ss, d
B
4045
51015
0
20253035
Hospital Grade (35-42 dB Attenuation)
0 1
0 500 1000 1500 2000 2500 3000 3500 4000
2 3 4 5 6 7 8 9 10 11 12 13 14Exhaust Gas Velocity (in thousands (ft/min))
Exhaust Gas Velocity (m/min)
Est
imat
ed P
ress
ure
Dro
p (in
H20
)
Est
imat
ed P
ress
ure
Dro
p (in
Hg)
24
4 0.25
0
0.50
0.75
1.00
1.25
1.50
1.75
0
8
12
16
20
0 1
0 500 1000 1500 2000
2 3 4 5 6 7 8 9 10 11 12 13 14Exhaust Gas Velocity (in thousands (ft/min))
Exhaust Gas Velocity (m/min)
Est
imat
ed P
ress
ure
Dro
p (in
H20
)
Est
imat
ed P
ress
ure
Dro
p (in
Hg)
24
4 0.25
0
0.50
0.75
1.00
1.25
1.50
1.75
0
8
12
16
20
2500 3000 3500 4000
Note: When figuring Pressure Drop for side or middle side inlet units, add 3 inches H2O (0.22 inches Hg) to back pressure shown on curve.
Typical Attenuation Curves Typical Pressure Drop Curves
Section 2: Engine Exhaust Silencers
Table of ContentsSection 2: Engine Exhaust Silencers
Type 1 .............................................................................................2-3End In/Opposite End Out ...........................................................2-3
Type 3 .............................................................................................2-6Side In/End Out .........................................................................2-6
Type 4 .............................................................................................2-9Middle Side In/End Out ..............................................................2-9
Low Pressure Drop .......................................................................2-10Performance ............................................................................2-10End In/Opposite End Out .........................................................2-11
Space Saver .................................................................................2-13Performance ............................................................................2-13Slotted Connections ................................................................2-14Flanged Connections ...............................................................2-15
* Specify “F” for flanged or “P” for pipe threads.Drains are standard on all silencers with a 9" (225 mm) body diameter or larger.Specifications subject to change without notice.
* Specify “F” for flanged or “P” for pipe threads.Drains are standard on all silencers with a 9" (225 mm) body diameter or larger.Specifications subject to change without notice.
* Specify “F” for flanged or “P” for pipe threads.Drains are standard on all silencers with a 9" (225 mm) body diameter or larger.Specifications subject to change without notice.
* Specify “F” for flanged or “P” for pipe threads.Drains are standard on all silencers with a 9" (225 mm) body diameter or larger.Specifications subject to change without notice.
* Specify “F” for flanged or “P” for pipe threads.Drains are standard on all silencers with a 9" (225 mm) body diameter or larger.Specifications subject to change without notice.
* Specify “F” for flanged or “P” for pipe threads.Drains are standard on all silencers with a 9" (225 mm) body diameter or larger.Specifications subject to change without notice.
* Specify “F” for flanged or “P” for pipe threads.Drains are standard on all silencers with a 9" (225 mm) body diameter or larger.Specifications subject to change without notice.
nelsonglobalproducts.com
Engine Exhaust Silencers
2-10
31.5 63 125 250 500 1K 2K 4K 8K 16K 32K
32
48
12
0
16202428
Typi
cal A
ttenu
atio
n, d
B
Octave Band Center Frequency, Hz
Low Pressure Drop 1
31.5 63 125 250 500 1K 2K 4K 8K 16K 32K
32
48
12
0
16202428
Typi
cal A
ttenu
atio
n, d
B
Octave Band Center Frequency, Hz
Low Pressure Drop 2
Low Pressure Drop 1
0 1
0 500 1000 1500 2000 2500 3000 3500 4000
2 3 4 5 6 7 8 9 10 11 12 13 14Exhaust Gas Velocity (in thousands (ft/min))
Exhaust Gas Velocity (m/min)
Est
imat
ed P
ress
ure
Dro
p (in
H20
)
Est
imat
ed P
ress
ure
Dro
p (in
Hg)
24
4 0.25
0
0.50
0.75
1.00
1.25
1.50
1.75
0
8
12
16
20
Low Pressure Drop 2
0 1
0 500 1000 1500 2000 2500 3000 3500 4000
2 3 4 5 6 7 8 9 10 11 12 13 14Exhaust Gas Velocity (in thousands (ft/min))
Exhaust Gas Velocity (m/min)
Est
imat
ed P
ress
ure
Dro
p (in
H20
)
Est
imat
ed P
ress
ure
Dro
p (in
Hg)
24
4 0.25
0
0.50
0.75
1.00
1.25
1.50
1.75
0
8
12
16
20
Note: When figuring Pressure Drop for side or middle side inlet units, add 3 inches H2O (0.22 inches Hg) to back pressure shown on curve.
Low Pressure DropPerformance
Typical Attenuation Curves Typical Pressure Drop Curves
2 3 4 5 6 7 8 9 10 11 12 13 14Exhaust Gas Velocity (in Thousands (ft/min))
Exhaust Gas Velocity (m/min)Estim
ated Pressure D
rop (" H2 0)
Estim
ated Pressure D
rop (" Hg)
24
4 0.25
0
0.50
0.75
1.00
1.25
1.50
1.75
0
8
12
16
20
Note: When figuring Pressure Drop for side or middle side inlet units, add 3 inches H2O (0.22 inches Hg) to back pressure shown on curve.
• Space Saver silencers are designed for side in, end out mounting, although either end can be used as in inlet. Using end in, side out can result in lower attenuation reductions.
• Condensate drains are standard on all units.
Space SaverPerformance
Typical Attenuation Curve
Typical Pressure Drop Curve
nelsonglobalproducts.com
Engine Exhaust Silencers
2-14
Type
A Inlet/Outlet
Diameterin (mm)
B Outside
BodyDiameterin (mm)
C
BodyLengthin (mm)
D
Overall Lengthin (mm)
E
InletOffset
in (mm)
F
OutletOffset
in (mm)
G
InletLengthin (mm)
H
Length to Flangein (mm)
IFlange
toFlangein (mm)
JOffset
Seam toInlet
in (mm)Part
Number
A2.0
(50.8)7.00
(177.80)8.0
(203.2)12.70
(322.58)1.10
(27.94)–
4.0 (101.6)
12.0 (304.8)
4.0 (101.6)
4.0 (101.6)
47820S
A2.5
(63.5)8.50
(215.90)8.5
(215.9)13.33
(338.58)1.60
(40.64)–
4.0 (101.6)
12.5 (317.5)
4.0 (101.6)
4.3 (109.2)
47825S
A3.0
(76.2)12.11
(307.59)9.3
(236.2)14.65
(372.11)– –
4.0 (101.6)
13.1 (332.7)
3.9 (99.1)
4.6 (116.8)
47830S
A3.5
(88.9)12.11
(307.59)12.0
(304.8)19.42
(493.27)2.70
(68.58)–
4.0 (101.6)
18.0 (457.2)
6.0 (152.4)
6.0 (152.4)
47835S
A4.0
(101.6)12.11
(307.59)16.0
(406.4)23.32
(592.33)2.40
(60.96)–
4.0 (101.6)
21.9 (556.3)
5.9 (149.9)
8.0 (203.2)
47840S
A5.0
(127.0)16.11
(409.19)16.5
(419.1)23.89
(606.81)3.70
(93.98)–
4.0 (101.6)
22.4 (569.0)
5.9 (149.9)
8.2 (208.3)
47850S
B6.0
(152.4)16.11
(409.19)22.0
(558.8)29.49
(749.05)2.50
(63.50)1.5
(38.1)4.0
(101.6)28.0
(711.2)6.0
(152.4)11.0
(279.4)47860S
D
G
B A
A
Type A
3 Slots0.12 x 1.2
(3.1 x 30.5)
E
HC
JI
D
G
BA
A
Type B
3 Slots0.12 x 1.2
(3.1 x 30.5)
E
F
HC
JI
Space SaverSlotted Connections
nelsonglobalproducts.com 2-15
Engine Exhaust Silencers
Type
A
Inlet/OutletDia-
meterin
(mm)
B
OutsideBodyDia-
meterin
(mm)
C
BodyLength
in (mm)
D
Overall Length
in (mm)
E
InletOffset
in (mm)
F
OutletOffset
in (mm)
G
InletLength
in (mm)
H
Length to
Flangein
(mm)
I
Flangeto
Flangein
(mm)
J
Offset Seam
toInletin
(mm)
K
Mount-ing
Flange Boltin
(mm)
L
BoltHoleDia-
meterin
(mm)
MMount -ing
FlangeDia-
meterin
(mm)Part
Number
A4.0
(101.6)12.11
(307.59)16.0
(406.4)23.32
(592.33)2.40
(60.96)—
4.0 (101.6)
21.9 (556.3)
5.9 (149.9)
8.0 (203.2)
0.750 (19.050)
7.50 (190.50)
9.0 (228.6)
47840F
A5.0
(127.0)16.11
(409.19)16.5
(419.1)23.89
(606.81)3.70
(93.98)—
4.0 (101.6)
22.4 (569.0)
5.9 (149.9)
8.3 (210.8)
0.875 (22.225)
8.50 (215.90)
10.0 (254.0)
47850F
A6.0
(152.4)16.11
(409.19)22.0
(558.8)29.49
(749.05)2.50
(63.50)1.5
(38.1)4.0
(101.6)28.0
(711.2)6.0
(152.4)11.0
(279.4)0.875
(22.225)9.50
(241.30)11.0
(279.4)47860F
A8.0
(203.2)22.15
(562.61)25.0
(635.0)36.28
(921.51)4.50
(114.30)3.4
(86.4)4.0
(101.6)33.0
(838.2)8.0
(203.2)12.5
(317.5)0.875
(22.225)11.75
(298.45)13.5
(342.9)47880F
A10.0
(254.0)26.15
(664.21)30.0
(762.0)41.87
(1,063.50)4.42
(112.27)4.0
(101.6)4.0
(101.6)38.0
(965.2)8.0
(203.2)15.0
(381.0)1.000
(25.400)14.25
(361.95)16.0
(406.4)47882F
B12.0
(304.8)30.21
(767.33)36.0
(914.4)48.41
(1,229.61)3.58
(90.93)3.5
(88.9)4.0
(101.6)44.0
(1,117.6)8.0
(203.2)18.0
(457.2)1.000
(25.400)17.00
(431.80)19.0
(482.6)47884F
B14.0
(355.6)36.21
(919.73)36.0
(914.4)51.29
(1,302.77)6.50
(165.10)5.0
(127.0)4.0
(101.6)46.0
(1,168.4)10.0
(254.0)18.0
(457.2)1.125
(28.575)18.78
(477.01)21.0
(533.4)47886F
D
G
B
A
AM
0.625 (15.9)(thickness)Mild Steel
0.625 (15.9)(thickness)Mild Steel
E
L
15°30° Typical
HC
J
K
I
F
Type A
D
G
B A
AF
M
0.625 (15.9)(thickness)Mild Steel
0.625 (15.9)(thickness)Mild Steel
E
L
HC
J I
15°
30° Typical
K
Type B
Space SaverFlanged Connections
nelsonglobalproducts.com
Engine Exhaust Silencers
2-16
Notes
Section 3: Silencer Accessories
Table of ContentsSection 3: Silencer Accessories
Insulation Blankets ..........................................................................3-3Benefits .....................................................................................3-3About the Blankets ....................................................................3-3Specifications ............................................................................3-3
BenefitsInsulation blankets on diesel exhaust systems offer the following benefits:
• Reduce external system surface temperature by as much as 1,000 °F (538 °C)
• Silence sound by as much as 3 dB• Substantially reduce heat transfer into buildings
and enclosures• Multi-use – remove and reuse on other diesel
exhaust systems
About the BlanketsNelson Global Products brand insulated blankets are constructed of three unique plies:
Inside Ply is made of a knitted stainless steel wire mesh
Middle Ply is a Type E fiberglass insulation*
Outer Ply is made from silicone-impregnated fiberglass fabric
High-temperature resistant silicone provides significantly longer life and improved resistance to abrasion, flexing wear, tears, and punctures. The heavy-duty inner lining fabric is resistant to oils and acids/alkalis, as well as being flame retardant.
All blanket edges are machine-stitched using high grade fiberglass thread and fastened with permanently mounted stainless steel hooks. The blankets are laced in place “boot-style” with stainless steel tie wire, resulting in a custom-made “glove fit.”* Type E fiberglass insulation is designed for insulation within high-
temperature equipment. It is manufactured from chopped fiberglass fibers and is free of resinous binders, which enables its use in the high-temperature ranges. Type E insulation is flexible, lightweight, and will not compact under vibration.
SpecificationsEach insulation blanket conforms with the requirements of Military Specifications MIL-I-164-E, Type II.
• All assemblies are heli-arc welded to ensure that the base material is not undercut.
• Expanded and slotted cuffs can be substituted for male pipe threads at no charge.
• Caterpillar® or Nelson Global Products flanges can be substituted for an ANSI flange at no charge.
• Wye Assembly can be modified with large outlet flanges upon request.
• We verify engine outlet flange dimensions and outlet centerline spreads on each order due to continuous changes by engine manufacturers.
Note: 14–16" (356-406 mm) no deduct below 18" (457 mm); furnished with 150 lb (68 kg) standard flanges and stainless steel bellows.
Reducing Flex Connectors
Wye Assembly
ANSI Flanged Connectors
Male NPT Connectors
Connectors
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Silencer Accessories
Exhaust Stack
Outside Diameterin (mm)
Part Number
2.00 (50.80) 89420A
2.50 (63.50) 89425A
3.00 (76.20) 89430A
3.50 (88.90) 89435A
4.00 (101.60) 89440A
5.00 (127.00) 89450A
6.00 (152.40) 89460A
8.00 (203.20) 89480A
8.25 (209.55) 89483A
10.00 (254.00) 89482A
10.40 (264.16) 89495A
12.00 (304.80) 89484A
12.40 (314.96) 89498A
14.00 (355.60) 89486A
16.00 (406.40) 89488A
18.00 (457.20) 89492A
20.00 (508.00) 89494A
22.00 (558.80) 89496A
Explosion Relief Cover• Explosion relief covers are designed to
open at 5 lb/in2 (35 kPa) to protect silencer shell against rupture in case of backfire or explosion of residual gases within the exhaust system. One unit in the first chamber of silencer is adequate.
Rain Caps
ExplosionRelief CoverGasket
InspectionOpening
SilencerInlet
P
Diameter
Body Sizein (mm)
Pressure Relief Cover Diameter
in (mm)Part
Number10-14 (254-356) 4.125 (104.775) Q34361
16-18 (406-457) 8.125 (206.375) Q34362
22-26 (559-660) 8.250 (209.550) Q34363
30-36 (762-914) 12.375 (314.325) Q34853
42-48 (1,067-1,219) 16.000 (406.400) Q34854
54-60 (1,372-1,524) 20.000 (508.000) Q34855
Covers and Caps
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Silencer Accessories
Size (P)in (mm)
Gasket Kit (Nut/Bolt)
Part NumberGasket Part
Number4.0 (101.6) Q347458 Q04166
5.0 (127.0) Q347459 Q04167
6.0 (152.4) Q347460 Q04168
8.0 (203.2) Q347461 Q04169
10.0 (254.0) Q347462 Q04170
12.0 (304.8) Q347463 Q04171
14.0 (355.6) Q347464 Q04172
16.0 (406.4) Q347465 Q79468
18.0 (457.2) Q347466 Q79469
20.0 (508.0) Q347467 Q79470
22.0 (558.8) Q347468 Q79471
Inspection Opening Size
in (mm)Weightlb (kg)
Part Number
5 × 7 (127 × 178) 6.0 (2.7) Q34822
8 × 10 (203 × 254) 12.0 (5.4) Q34852
Inspection Openings• Inspection openings have
removable covers to provide access to silencer internals for inspection or cleaning. One opening per silencer is recommended.
Note: Outlet Extensions include nuts, bolts, and gasket.
Note: Mounting bracket clamps are available for silencers up to 36" (914 mm) body diameter. Split design allows for easier installation of larger silencers. Each part consists of two mounting brackets.
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Silencer Accessories
Vertical Installation
Horizontal Installation
Type B Bracket
Type E Bracket
Type F Bracket
Type D Bracket
(Optional)
Silencers that require custom weld-on bracket mounting are available upon review.
Nelson Global Products has a standard bracket type (B, D, E and F) per silencer body diameter.
Contact your Nelson Global Products representative for more information.